com.github.zdsiyan.maven.plugin.smartconfig.internal.RegexConfigurator.java Source code

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Here is the source code for com.github.zdsiyan.maven.plugin.smartconfig.internal.RegexConfigurator.java

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/*-
 * ========================LICENSE_START=================================
 * Smartconfig Maven Plugin
 * *
 * Copyright (C) 2016 BruceZhang
 * *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * =========================LICENSE_END==================================
 */

package com.github.zdsiyan.maven.plugin.smartconfig.internal;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.commons.io.IOUtils;
import com.github.zdsiyan.maven.plugin.smartconfig.Configurator;

import com.github.zdsiyan.maven.plugin.smartconfig.model.PointHandle;

/**
 * regex?.
 *
 * @author Kevin Zou <kevinz@skfiy.org>
 */
public class RegexConfigurator implements Configurator {

    @Override
    public ByteArrayOutputStream execute(InputStream in, Charset charset, List<PointHandle> pointhandles)
            throws IOException {
        String text = IOUtils.toString(in, charset);

        Pattern pattern;
        Matcher matcher;
        for (PointHandle point : pointhandles) {

            pattern = Pattern.compile(point.getExpression());
            matcher = pattern.matcher(text);

            while (matcher.find()) {
                switch (point.getMode()) {
                case insert:
                    break;
                case delete:
                    break;
                case replace:
                default:
                    text = matcher.replaceAll(point.getValue());
                    break;
                }
            }
        }

        ByteArrayOutputStream out = new ByteArrayOutputStream();
        out.write(text.getBytes(charset));
        return out;
    }

}